ADHD makes me useless to God?

I was just tested for ADHD and have it. Combined type actually. And I was just stressed out about it. I don't see how God can use a girl with ADHD. I know He's got great plans for me, but why do I have to be the one with the big plans? I'm currently in the midst of getting a boyfriend, but God had to bring this along. What could he do with me? I'm usless.